3
Dual Lock™ Reclosable Fasteners
with Acrylic Foam Tape
Application Guide
Summary
February, 2008
Most substrates are best prepared by cleaning with a 50:50 mixture of isopropyl alcohol (IPA)
and water* prior to applying 3M™ Dual Lock™ Reclosable Fasteners.
Exceptions to this general procedure that may require additional surface preparation include:
• Heavy Oils: A degreaser or solvent-based cleaner may be required to remove heavy oil or
grease from a surface and should be followed by cleaning with IPA/water.
• Abrasion: Abrading a surface, followed by cleaning with IPA/water, can remove heavy dirt
or oxidation and can increase surface area to improve adhesion.
• Adhesion Promoters: Priming a surface can significantly improve initial and ultimate
adhesion to many materials such as plastics and paints.
• Porous Surfaces: Most porous and fibered materials such as wood, particleboard, concrete,
etc. need to be sealed to provide a unified surface.
• Unique Materials: Special surface preparation may be needed for glass and glass-like
materials, copper and copper containing metals and plastics or rubber that contain
components that migrate (e.g. plasticizers).
General
Procedure
• The Dual Lock reclosable fasteners and substrates should have equilibrated for a minimum
of one hour at temperatures of 68° to 80°F (20° to 27°C) before application.
• To obtain optimum adhesion, the
bonding surfaces must be well unified
(see porous surfaces above), clean and
dry. Typical surface cleaning solvents
are IPA/water mixture (rubbing alcohol)
or heptane.* (Steps A and B.)
• Application Procedure: Bond strength
is dependent upon the amount of
adhesive-to-surface contact developed.
Firm application pressure develops better
adhesive contact and helps improve bond
strength. (Steps C and D.)
Step A:
Solvent wipe
Step B:
Wipe dry
Step C:
Apply 3M™ Dual Lock™
Reclosable Fastener to surface
Step D:
Roll down 3M™ Dual Lock™
Reclosable Fastener
*Note: These cleaner solutions contain greater than 250 g/l of volatile organic compounds (VOC). Please consult your
local Air Quality Regulations to be sure the cleaner is compliant. When using solvents, extinguish all ignition sources,
including pilot lights, and follow the manufacturer’s precautions and directions for use. Be sure to follow all government
regulations and the manufacturer’s precautions and directions for use when using solvents or other cleaning methods.
(1)
Application Guide
3M™ Dual Lock™ Reclosable Fasteners with Acrylic Foam Tape
General Procedure
(continued)
• 3M™ Dual Lock™ Reclosable Fastener Application Procedure:
° For small pieces: The liner is removed from the Dual Lock reclosable fastener
adhesive. Without touching the adhesive, the Dual Lock reclosable fastener is
applied to the surface using light finger pressure. The Dual Lock reclosable
fastener must then be rolled down with a rubber-covered hand roller, being
careful not to crush the Dual Lock reclosable fastener stems. It is suggested to
roll down the Dual Lock reclosable fastener at least once in each direction with
a 4.5 lb. to 10 lb. roller to insure 100% adhesive contact, especially around the
perimeter of the part.
° For long strips: The liner is removed from the Dual Lock reclosable fastener
adhesive. Without touching the adhesive, the Dual Lock reclosable fastener is
aligned on the substrate surface. One end of the Dual Lock reclosable fastener
strip is pressed down (tabbed) to the substrate while holding the other end of
the strip under light tension. The Dual Lock reclosable fastener strip is then
slowly rolled down the entire length of the strip from the tabbed end with a
rubber covered hand roller, taking care not to trap air bubbles under the
adhesive and not to crush the Dual Lock reclosable fastener stems. It is
suggested to roll down the reclosable fastener at least once in each direction
with a 4.5 lb. to 10 lb. roller to insure 100% adhesive contact, especially around
the perimeter of the part.
• Evaluate Application Procedure: A Clear Test Panel (Glass, Acrylic, or
Polycarbonate) can be used to evaluate and improve application procedure. Using
the above procedure, apply the Dual Lock reclosable fastener to a Clear Test
Panel. After Dual Lock reclosable fastener has been applied, examine the back
side of the panel for adhesive wet out (contact area). It is important to adjust
application procedure and roll down to insure almost 100% contact, especially
around the perimeter of the parts.
• The pressure-sensitive adhesive bonds to the substrate on contact and parts can be
handled immediately. Adhesive bond strength increases with time, pressure and
temperature. A minimum of twenty four hours dwell time is recommended before
applying a load or disengaging assembled parts.
° After application, the bond
Typical Bond Build Over Time
strength will increase as the
PERCENT OF FULL BOND
■
100
■
●
■
■
■
■
■
■
●
■
● ■ ●
adhesive flows onto the
●
●
●
●
●
●
■
●
surface. At room temperature, 80■
●
●
★
approximately 50% of the
★
★
●
★
★
60
★
★
ultimate strength will be
★
●
★
★
achieved after 20 minutes,
★
40
★
★
90% after 24 hours and 100%
after 72 hours. In some cases, 20
● ROOM TEMP
★ 50°F
■ 150°F or ABRADE
bond strength can be
0
72 HOURS
20 MIN 1 HOUR
24 HOURS
increased and ultimate bond
strength can be achieved more quickly by exposure of the bond to elevated
temperatures (e.g. 150°F [66°C] for 1 hour).
(2)
Application Guide
3M™ Dual Lock™ Reclosable Fasteners with Acrylic Foam Tape
Heavy Oils
On surfaces with a light oily film, or other light contamination, the 50:50 IPA/water solution is usually
adequate. Where heavy oils or grease are present, a “degreasing” solvent such as 3M™ Prep Solvent 70,
3M™ Citrus Base Cleaner, mineral spirits, naphtha or similar solvents are suggested to cut the oil. This
should always be followed with an IPA/water cleaning to help ensure that any residue or film is removed.*
Abrasion
Abrading a surface can serve several functions:
• Remove heavy levels of dirt or oxide from metals or paints (e.g. galvanized steel).
• Create additional surface area that can increase adhesion.
• Smooth a surface to obtain more flatness, allowing improved contact area.
Abrasion often helps adhesion to paints and plastics. When abrading, it is important for tapes to have a
finely abraded surface. Very small scratches in the surface, generated with circular motion rather than
straight-line motion, are most desirable. A surface with many micro-scratches in it can have up to 40%
additional available surface area, translating to higher ultimate strength and greater initial adhesion.
Scotch-Brite® Hand Pads (such as 7447 Maroon or Heavy Duty Green) are good for achieving the right
level of abrasion. Tools such as a power palm sander will assist on large jobs. Avoid grinding a surface
with coarse abrasive materials, since they may create too rough of a texture for the adhesive to
adequately flow into the surface. Always clean the surface with the IPA/water solution or additional
methods previously described, and be certain that all loose particles are removed prior to bonding.
Adhesion
Promoters
Priming a surface can significantly improve initial and ultimate adhesion to many materials such as
plastics and paints because of their low surface energy or the additives they may contain. A primer
creates a new surface for 3M™ Dual Lock™ Reclosable Fasteners to adhere to and can also create a
layer that may impede the migration of additives that may be present in a material. If needed for LSE
and difficult to bond to substrates, lightly abrading a surface with Scotch-Brite® Hand Pad prior to
applying the adhesion promoter can sometimes improve its bond performance to the substrate. It is
important for the user to determine the suitability of the Dual Lock reclosable fastener, the adhesion
promoter and the application process. Consult Technical Data Sheet on individual promoters for
suggested application procedure.
Porous
Surfaces
Rough, porous or fibered materials such as wood, particleboard, cement, etc., have an open surface and
require sealing to provide a unified surface for tape bonding. Common sealing materials would include
paint, varnish or other hard surface coatings. Fast drying 3M™ Rubber & Vinyl 80 Spray Adhesive can
also be used to unify the surface and improve the tape bond.
Unique
Surfaces
Glass, stone, ceramic or other siliceous materials are hydrophilic (water-loving) by nature. Normally, the
hydrophilic nature makes pressure sensitive adhesive bond durability susceptible to change under high
humidity or exposure to moisture. In basic terms, water vapor can undercut the tape bond and interfere
with the normal adhesion forces. Silane coupling agents, added to the IPA/water cleaning solution, can
help reduce the “water-loving” tendency of these surfaces and enhance the tape bond in high moisture
environments.
Copper, brass, and bronze are prone to oxidation even after the Dual Lock reclosable fastener is applied.
To prevent a weakening of the bond, a lacquer or varnish should be applied to these surfaces. Be sure to
test the tape bond to the sealer on a metal surface to verify good adhesion.
Flexible PVC (vinyl) contains plasticizers that can migrate into the tape and affect adhesion. The Dual
Lock reclosable fasteners with Multi-Purpose 1 or 2 Acrylic Adhesives are formulated to be resistant
to plasticizer migration, or 3M™ Adhesive Promoter 2262AT can serve as a barrier to migration.
Rubber materials (e.g. EPDM, neoprene) can have low surface energy and may also contain plasticizers
and oils. These require the use of an adhesion promoter for stable bond strength. Test for compatibility
with flexible PVC and rubber materials by aging bonded samples for a week at 150°F (66°C) and
check for softening of the adhesive, discoloration or reduction in bond strength.
*Note: These cleaner solutions contain greater than 250 g/l of volatile organic compounds (VOC). Please consult your
local Air Quality Regulations to be sure the cleaner is compliant. When using solvents, extinguish all ignition sources,
including pilot lights, and follow the manufacturer’s precautions and directions for use. Be sure to follow all government
regulations and the manufacturer’s precautions and directions for use when using solvents or other cleaning methods.
(3)
Application Guide
3M™ Dual Lock™ Reclosable Fasteners with Acrylic Foam Tape
Suggested Primers
The table below offers suggested primers and alternative methods that commonly require
primers, adhesion promoters or other surface treatments for successful use with 3M™ Dual
Lock™ Reclosable Fasteners. This list is not intended to be fully comprehensive, but may
be useful for many applications. It is very important for the user to determine the suitability
of the Dual Lock reclosable fasteners, primer and application process and compliance with
local Air Quality Regulations.
3M™ Adhesion Promoter Usage Chart*
Substrate/Surface
Concern
4298UV or 3M
Primer 94
4296T
2262AT(a)
K500 N-200J C-100J K520UV
111
Silane Glass
Treatment
AP 115(b)
X
Other Alternatives
Steel or Aluminum
Surface must be clean
Abrasion may clean surface
Copper, Brass, Bronze
Oxidation after bonding
Glass, Stone, Ceramic, Tile
High humidity moisture
Concrete, Brick
Non-unified or rough
surface, moisture
3M™ Rubber & Vinyl 80 Spray
Adhesive, concrete sealer, paint
Wood (soft, hard particle
board, etc.)
Weak fiber layer on
surface
3M™ Rubber & Vinyl 80 Spray
Adhesive, 3M™ Fastbond 30
Contact Adhesive, urethane
paint, varnish(b)
Lacquer or varnish,
architectural grade coatings
X
P
Paints
Low adhesion
PVC
Migrating oils
X
X
X
P
P
PP
Low adhesion
P
TPO
Low adhesion
P
Fascia Paint
Low adhesion
EPDM Rubber
Low adhesion,
migrating oils
P
X
Neoprene, Santoprene™
Rubber
Low adhesion,
migrating oils
P
X
TPU, Polyurethane
Mold release, low
adhesion
X
ABS
Mold release, low
adhesion
X
TPV/TPE
Mold release, low
adhesion
P
PC
Mold release, low
adhesion
P
Acrylic
Mold release, low
adhesion
P
Nylon
Mold release, low
adhesion
X
P
Polyester
Mold release, low
adhesion
X
P
RIM
Mold release, low
adhesion
X
X
P
X
X
Abrade surface
Evaluate Multi-Purpose
Adhesives 1 or 2 and test
for migration
X
X
or similar silane coupling
agent in IPA/water mixture
Flame treatment,
Corona treatment
X
P
X
P
P
X
3M™ Scotch-Grip™ Plastic
Adhesive 1099
X
X
X
X
Abrade and prime
X
X
X
X
X
X
P
P - Primary Choice
X - Other Possibilities
3M™ Adhesion Promoter 2262AT is not a preferred OEM recommendation for exterior applications.
Solvent-based adhesion promoter use limited in California as required by Air Quality Management Directive.
4298UV and K520UV are premixed with UV dye.
*Note: These primers contain greater than 250 g/l of volatile organic compounds (VOC). Solvent based adhesion promoter
use limited in California as required by Air Quality Management Directive. Please consult your local Air Quality
Regulations to be sure these primers are compliant.
(a)3M™
(b)See
Adhesion Promoter 2262AT contains 57 g/l VOC less water and less exempt solvent.
supplier information.
(4)
Application Guide
3M™ Dual Lock™ Reclosable Fasteners with Acrylic Foam Tape
Primer Source
and Description
• 3M™ Primer 94, 3M™ Adhesion Promoter 111 and 3M™ Silane Glass
Treatment AP 115 are available through distributors that carry 3M™ Dual
Lock™ Reclosable Fasteners.
• 3M™ Adhesion Promoter 2262AT is ready-to-use, pre-diluted (ten parts
Acetone/one part 2262) version of 3M™ Scotch-Grip™ Plastic Adhesive 1099.
• 3M™ Adhesion Promoters are available from Customer Service at
(317) 290-1600.
• Silane Coupling Agent is also available premixed in a 91:9 IPA/water solution
or as a concentrate. A 0.5 wt. % level of silane* adhesion promoter diluted in a
91:9 IPA/water cleaning solution has been found to be sufficient.
Suggested Sources for Silane Coupling Agents:
Custom-Pak Products, Inc. (262) 251-6180 available premixed in IPA/water
Lancaster Synthesis, Inc. (603) 889-3306 available 100% concentrated
*Note: Be sure to read and follow silane and solvent manufacturer’s precautions
and directions for use for proper handling and storage information.
Run an Evaluation
Because 3M cannot anticipate all of the different possible surfaces and contaminants
that may exist, it is imperative that the user conduct an evaluation to determine the
suitability of 3M™ Dual Lock™ Reclosable Fasteners, surface preparations
procedures, and any other processes that may have an influence on the tape or the
bonded parts. Likewise, where there are any changes in plastic or paint formulation,
or suppliers of these materials, it is advisable to run evaluations to ensure that the
change has not influenced the compatibility of the surface with Dual Lock reclosable
fasteners.
Sources
Hand held J-Roller:
Rockler Woodworking and Hardware
Phone: (800) 279-4441 Specify #39463
www.rockler.com
(5)
Application Guide
3M™ Dual Lock™ Reclosable Fasteners with Acrylic Foam Tape
Product Use
All statements, technical information and recommendations contained in this document are based upon
tests or experience that 3M believes are reliable. However, many factors beyond 3M’s control can affect
the use and performance of a 3M product in a particular application, including the conditions under
which the product is used and the time and environmental conditions in which the product is expected to
perform. Since these factors are uniquely within the user’s knowledge and control, it is essential that the
user evaluate the 3M product to determine whether it is fit for a particular purpose and suitable for the
user’s method of application.
Limited Warranty
3M warrants for 24 months from the date of manufacture that 3M™ Dual Lock™ Reclosable Fasteners
with Acrylic Foam Tape will be free of defects in material and manufacture. 3M MAKES NO OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. This limited
warranty does not cover damage resulting from the use or inability to use 3M™ Dual Lock™ Reclosable
Fasteners with Acrylic Foam Tape due to misuse, workmanship in application, or application or storage
not in accordance with 3M recommended procedures.
Limitation of
Remedies and
Liability
If the 3M™ Dual Lock™ Reclosable Fasteners with Acrylic Foam Tape is proved to be defective within
the warranty period stated above. THE EXCLUSIVE REMEDY, AT 3M’S OPTION, SHALL BE TO
REFUND THE PURCHASE PRICE OF OR TO REPAIR OR REPLACE THE DEFECTIVE 3M™ DUAL
LOCK™ RECLOSABLE FASTENERS WITH ACRYLIC FOAM TAPE. 3M shall not otherwise be liable for
loss or damages, whether direct, indirect, special, incidental, or consequential, regardless of the legal
theory asserted, including negligence, warranty, or strict liability.
ISO 9001: 2000
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001: 2000 standards.
3
Industrial Adhesives and Tapes Division
3M Center, Building 21-1W-10, 900 Bush Avenue
St. Paul, MN 55144-1000
800-362-3550 • 877-369-2923 (fax)
www.3M.com/industrial
Recycled Paper
40% pre-consumer
10% post-consumer
(6)
Scotch-Brite is a registered trademark of
3M Company.
3M, Dual Lock and Scotch-Grip are
trademarks of 3M Company.
Santoprene is a trademark of Monsanto
Corporation.
Printed in U.S.A.
©3M 2008 70-0709-4029-4 (2/08)